After rebirth, Mu Yunyao never did three things: be kind to others, leave a chance for evil, and believe in true feelings. She was sinister and reckless, who would rather turn the world upside down than stoop to compromise. However, there was always a cold-faced prince tailing her secretly, who wanted to marry and adore her.

Lin Beichen, an otaku, got a mobile phone by coincidence, and the mobile phone took him into a world called Dongdong Zhenzhou. Here, he became the first son of Lin Jinnan, one of the top ten famous men in the North Sea Empire [Zhantianhou]. He was also a notorious black sheep, and was born with brain disease. When Hou Lin was defeated in the south during the war, his family was in decline, and Lin Beichen, who lost his backer, was stuck in school by various' enemies' and couldn't go out. In a critical moment, he was surprised to find that the mobile phone he brought with him turned out to be a plug-in artifact that could help him practise. Relying on this artifact, Lin Beichen opened his own way of hilarious counterattack.

The protagonist, Kurogane Yaiba, is a samurai wild child who trains in the jungle with his father, Kenjurou. By a twist of fate, the determined samurai, Yaiba, returns to Japan and encounters his rival, Onimaru Takeshi. Yaiba, who lives for serious battles, embarks on a spectacular adventure when Onimaru obtains the "Legendary Demon Sword!"